18520
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BrandPhilips
ClassRadiation Counter Tube
Construction
Primary TypeHalogen-quenched Geiger-Muller Tube
EnvelopeMetal-Chrome-Iron
Base MaterialPlastic cap
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage500 V
Audio Performance
Key Features
- Halogen-quenched
- Gamma radiation measurement
- Ne-Ar-Halogen Filling
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Radiation Counting | 375V | - | 5400000 | - | - |
Application Notes
Background measured unshielded (90 cpm) and shielded with 2 inch Pb and 1/4 inch Al (40 cpm). Anode resistor consists of two 2.7 MOhm resistors in series.
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